Earl Cain (Japanese: 伯爵カインシリーズ, Hepburn: Hakushaku Kain Shirīzu), also known as Count Cain, is a gothic shōjo manga series written and illustrated by Kaori Yuki. Debuting in the Japanese manga magazine Bessatsu Hana to Yume in December 1991, the manga was eventually transferred to Hana to Yume, where it ran until 1994; the chapters of the sequel, Godchild, appeared between the May 2001 issue and the October 2003 issue in Hana to Yume. Two drama CDs based on the series were also released. Set in 19th-century England, the series focuses on a young earl named Cain Hargreaves who solves murders while encountering his father's secret organization, Delilah, that experiments with reviving the dead.
The setting of the manga was inspired by "the darker, grislier side" of the Victorian upper class and her admiration of films set in the Victorian time period. For Godchild, she traveled to London to do historical research and visited seven historical sites there. In the series, she refers to the Bible as well as real-life literary works, films and people. Reviewers have found a range of themes in the series. Critical reaction to The Cain Saga was mixed: some felt that the mysteries were well-done with detailed art, while others found the art crude and the short stories confusing and predictable. Reviewers praised Godchild as an overdone, entertaining series with detailed and distinct art.